dynare/matlab/doc/transition_matrix.html

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<title>Description of transition_matrix</title>
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<div><a href="../index.html">Home</a> &gt; <a href="index.html">.</a> &gt; transition_matrix.m</div>
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<h1>transition_matrix
</h1>
<h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>makes transition matrices out of ghx and ghu</strong></div>
<h2><a name="_synopsis"></a>SYNOPSIS <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>function [A,B] = transition_matrix(dr) </strong></div>
<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre class="comment"> makes transition matrices out of ghx and ghu</pre></div>
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<h2><a name="_cross"></a>CROSS-REFERENCE INFORMATION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
This function calls:
<ul style="list-style-image:url(../matlabicon.gif)">
</ul>
This function is called by:
<ul style="list-style-image:url(../matlabicon.gif)">
<li><a href="dr1.html" class="code" title="function [dr,info]=dr1(dr,task)">dr1</a> Copyright (C) 2001 Michel Juillard</li></ul>
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<h2><a name="_source"></a>SOURCE CODE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre>0001 <span class="comment">% makes transition matrices out of ghx and ghu</span>
0002
0003 <a name="_sub0" href="#_subfunctions" class="code">function [A,B] = transition_matrix(dr)</a>
0004 <span class="keyword">global</span> M_
0005 exo_nbr = M_.exo_nbr;
0006 ykmin_ = M_.maximum_endo_lag;
0007
0008 nx = size(dr.ghx,2);
0009 kstate = dr.kstate;
0010 ikx = [dr.nstatic+1:dr.nstatic+dr.npred];
0011
0012 A = zeros(nx,nx);
0013 k0 = kstate(find(kstate(:,2) &lt;= ykmin_+1),:);
0014 i0 = find(k0(:,2) == ykmin_+1);
0015 A(i0,:) = dr.ghx(ikx,:);
0016 B = zeros(nx,exo_nbr);
0017 B(i0,:) = dr.ghu(ikx,:);
0018 <span class="keyword">for</span> i=ykmin_:-1:2
0019 i1 = find(k0(:,2) == i);
0020 n1 = size(i1,1);
0021 j = zeros(n1,1);
0022 <span class="keyword">for</span> j1 = 1:n1
0023 j(j1) = find(k0(i0,1)==k0(i1(j1),1));
0024 <span class="keyword">end</span>
0025 A(i1,i0(j))=eye(n1);
0026 i0 = i1;
0027 <span class="keyword">end</span></pre></div>
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